Bolt anchor



April 1932- H w. PLEISTER ET AL 1,852,089

BOLT ANCHOR Filed April SO, 1931 3 Sheets-Sheet 1 ATTORN EY April 1932-H. w. PLEISTER ET AL 15209 BOLT ANCHOR Filed April SO. 1931 3Sheets-Sheet 2 ATTONEY April 5, 1932. w. PLEISTER ET AL BOLT ANCHORFiled April 50, 1931 3 Sheets-Sheet 3 l INVEN A NEY Patentenl pr. 5,1932 ;E-IENRY V. PLEISTER}OF WESTFIELD, AND 'JOHN.KARITZKY O5 GABWOOID',NEW- ASS'IG'NOBS 'ID HENRY B. NEWHA'LL COIEvPORATION, CF GARVJ'OOD,

JERSEY,

NEW

JERSEYA CORPORAIION' OF NEW JERSEY Our inventionrelates to holtm1cl1orS.

Our invention further relatesio holt an eher inclucling expancllngn1eans formecl eriginally in one integral piece, wit-h insegralconneeting me1nbe1s liolcling them together, said integral connecteclinennbers being broken in situ.

Our invention further rel2ies 130 an integral holt anchor fonnecl 0f aninteg1al shielcl 0T cage aml expancling means connectecl to saiclshielcl er sage by break-able 1neahs, saicl breakable means being ofsufficient 'strength to witnstanclhanelling ancl transportation.

ur invention iurtl1er relates to U. nmch-ine type expansion in whiclithe shielcl er cage. anal expancling means are all formeclintegral theexpanding means beingbroken from tl1e shielcl er Gage in siiu, analt;elescope anal expancl the shield 01 sage by the [ziel of the usualmachine bolt.

Our invention more particulanly 1elaees 150 such a holt anchor asClescribehl above, in Wlii0li tl1e-1i ial integral pa1fis a1e soarrangecl filmt when the integral connecting members are br0l;en in siu,obere canbe 110 relative rotary movement becween the shielcl o1 cageanal the exp-ancling means, Whether the eX pancling means be one 01'm01e laterally 1novable mernbers.

Our invention further relaces t0 such a holt ancl1orin whicl1 tl1esl1ielcl o1 cage is provielecl witl1 one 01 more lateral slots formingtines, ancl one er more integral i'igil expanding 1;nembers provideclwisn guicling, 01, g'ulllllg ?.ncl expanaling, 1neans exteneling intosuch slots, more O1 lese, and brealzable conneetions behveen ehe shielclan. tne guicling means, 01 guicling und expancling means, so that tl1ereWill be no -clanger of misalignment between the shielel und tneexpancling rnember, 0r

nembers, when broken in sicu.

Our invention "Eurtl1er relates t0 cereziin cembina-tions,sub-eombinations, articles 0f manufacture aml cletails of consjtruction,all o'f wl1icn will beniore fully hereinaiter :le scribel an l pointeclout in tne claims.

In -tl1e figures we have shown elifierent embocliments cf 0ur inventin,tl1e szunereference numerals refer to similar parts of the severalfigures.

man adaptecl to 1931. Serial N0. 533,918.

Fig. l is a plan view of One forma of bolii ancher, macle in accorclanceW1tl1 our inven.-

tion;

2 is an encl view looking to tl1e left of Fig. l;

; Fig. 3 is a vertical section on line 33 of 1 looking in tliecli1ection 0l i:l1e arrows; Eig. 4 1s a longitudinal sect wn 011 l1ne l40fliig. 2

; 1s a vert1cal sect1on 011 l1ne 55 of 0 23 7 Fig. 6 s a vercal sect1onof a mach1ne type holt anchor 0f Fig. l, mountecl m a hole,

9J1Cl abou t0 be expanclecl by a machine holt;

Fig. 7 is a vertical section, similzirto Fig.;6,

breaking bl1e connecting mexiibers Fig. 8 is a vercical section,-sirnilar 130 Fig..7, J

illustrqting :helelesc0}3ing acticin and thefull expans1on cf theexpansion bolt;

Fig. 9 is a vertical sction 0f a moclifieatien.

Fig, 14 is a vertical Section of "Ou1 holt an- Chor mountecl in a holeabout to be expanclecl by a l1amlner Fig. 15 is a vertical secsion holtanchor expanclecl.

Our inveneion relates t0 sinnplifyii1g an l cheapening anchors. vF01purposes oi:illustration we have shown in our drawings a Single arid(101ible type m2ichine holt eXpansi'on, though, Of

showin@ the course, our invention. is n0t eobelimiteclto:=

these paricularfexrnis 0'f expa1isionbolts.

ln tl1e 0rcliniry machine. type expansion ehe sl1ell 01 eage is forrnecl0f tWO er m01e split spring mng. Intliesingle type Inahine 10expzuision, a tappecl c0ne n'nt has to be asse'm- Vertical sectiondftl1e duble:

Fig. 9, about to -be' aesion ancl -the -ehe. cost of manufactnr1ng holtbled and held within the shell or case by the same split spring ring. Inthe double machine type there is, in acldition, an unthreaded conesleeve held in the other end 015 the shell-or cage by a second Splitspring ring. In transportation and in rough handling these assernbledparts are apt 120 become disconnected, and, in so1ne instances one 0rmore of the parts n1ight bec01ne lost, leading 150 the discard 0f theentire holt anchon Among other advantages of our invention We avoid allthe cost of assembling difl"erent parts, the cost of the split springrings, o1 other securing 1neans, any loss 0f parts in transportation orhandling, and cheapen the cost of manufacture.

By 0111 invention We cast, or otherwise form, a complete holt anchorW11311 the shield or Ca e and ex 3andin member or niembers as onearticle, connected together wit-h breakable connections adapted to bebroken in situ.

As Will more fully hereinafter appear our breakable connections, whichare adapted 10 be broken in sic-u, connect splines with the shield.These splines are caston the expand ing member o1 mernbers and arelocated initially, partially, in sl0ts in the cage o1 shield, so thatthere cari loe 110 misalignment of the cage 'or shield when thebreakable connecuions are broken.

We also preferably, though not necessarily, form the splines as wedges,so that in addition to performing the function of splines they assist inforcing the sides of the slots apart, thereby increasingthe grip 0r holdof the holt anchor in support;

In Figures 1 130 8, inclsive, We have shown a Single type machineexpansion; in Figures 9 to 13, inclusive, a d0uble type machineexpansion, and in Figures 14 and 15 a single type machine expansion,expanded by a hans- 1ner, or sirnilar tool, in a shallow hole. It 1s, ofcourse, 150 be understood that a doulole type machine expansion, such asillustrated 111 Figures 9 to 13 inelusive, could also be preset, in thesame manner in a shallow hole less than its length.

For purposes of illustration and a Wall or other suitable description Wewill describe our holt anchors as ceist,v they may be otherwise though,of course, formed.

In the single type machine expansion, 1 is the integral rigid holtanchor formed of the expansible rnember 2 and the expanding Ine1nber '3,rigidly held t'ogether by the integral breakable connectin'g rnembers18, 18. When cast, Whieh is the preferred methodof manufacture, thesebreakable connectingmembefs 18, 18, are runners, and are not brokenuntilthe holt anchor is expanded in situ.

The exp'ansible me1nber 2 is a Gage or shield provided with one or moreslots 5, 5, four being preferab the bead 6.

y employed, extending from The expanding me1nber 3 is cast at the sametime as the shield 0r cage 2 and is rigidly held to it by the breakableconnecting members, or runners, 18, 18. The member 3 is provided with anexterior conical surface 7, and With one or 1nore splines 8, 8, therepreierably, though not necessarily, being the sa1ne number of splines asthere are slots 5, 5 in the sage 01 shield. These splines 8,8 arepreierably, though not necessarily, form-ed as wedges so that after thebreakable connections 18, 18 are broken in situ, the wedges are forceddown the slocs 5, 5 towards the head 6, and force the Walls of' theslots apart,-

thereby inaterially assisting in forming a powerful grip 01 hold betweenthe shield 2 and the sides 9 of the hole 10 in the Wall o1 other support11. This action assists the rnain expanding action of'the cone nut 7cooperating with the flaring opening 12 of the shield. After our holtanchor is cast the 1nember 3 is tapped l tive rotation betvveen the conenut and the shield 2, because are in operative ating slots 5, 5.

In use a hole 10 is fonned in the Wall 11. The rigid integralholtanchor, Figures 1 and 2, is Ehen inserted in the hole 10. The'machine holt 15 is tl1en passed throngh a holel6 snpported 17, and isthreaded intothe rigid ab all times the splines 8, 8 position, withtheir cooperthe male threads 14 0f in the work to be' nut and the shielddrilled or otherwise inaznovable cone nut 3, Figure 6. By screwing uponthe head of the holt 15 the breakable connections 18, 18 betwee n theends 4, 4 0f the dilferent splines 8, 8 and the shield or Gage 2 18, 18,pe'rmits the cone nut 3 to radially spread he ends o1 the tines 20, 20,Fig. 8.

8, 8 to the shield 2 are 7 5 being now open, where they had preworslybeen closed by the ends 4, 4 of "the spl1nes 8, 8 and the breakableconnectins are bro-ken, Fignre 7. By continuing to rotate the holt 15 itWill be seen that there Abthesame filme the siclewallsr of th'e slots 5,5 are forcecl apartby the splines8, 8 which are preferably, thoughnot-necessarily, formed as weclges. This.ac tionof course, maerially'assists the main grip o1 boncl formecl by the cone nutoooperatingwiththe flaring surfaoe 12 of the shielrl.hf

It is, also, to be noted, that when the holt zmchor 3's cast eachbreakable connection 18, 18is a runner connecting each spline 8 with theshield at two points. If the shield is proviclecl W111l1 four slots 5,5, there Will loe eight runners or breakable connections, two for eachspline ancl each slot. An1ong other aclvanta ges tl1is facilitates theeven fiow 01 the metal in the mo1ild, because there are eight passagesfo1 the'metal;toollow between the sluelcl:and cone nut.- By olos1ng=eachof the slots 5, 5 wit=ha spline anclloreakable:con-- nectionsbetw eent-he splines anal the shield'a very l1gh, streng anclr1g1clyonstruot10Il-1s fo1med.-

Our invenion may also be emploj ed-with a clouble type machineexpansiofl. Wo have sl1o*wn one example of such a construct1on m F1gures9 50,13 1nclus1Ve.

vicled witl1. a central fing 01 stop 101, and two sets I" slots-l02,l02, and 103, 103.

Gast integral with the shielclil00 is a cone nut 101having a conicalsurface 105, in all respects sumlarto the s-mgle -type maclnne boltenchor previously clescriloed. This=cone 11112 is proviclecl withsplmesl06, 106, ohe very ends 107, 107 of thei splines10, 108 beim-glocated within theslots 102,102, the1e being ehe usua1 two runners, erbreakable-sonnentions, 108,108 beaween the ends 107, 107- of eachspline106a11cl the shielcl 100; theends of the splinesv anal ehe breakableconneotions close each slot 102, 102.-

The=shielcl orcage 100 is provicledwith two con-ical surface 105015 thecone 11115104, when The the breakalole connections are broken. cone nut-10-1 1s prowclecl whentenor screw threacls 112, thetsame as m the otherform.

A1; the other end 0f Ehe shield 01 cage 100 an integral sleeve1131soast, thesame es the cone nut 104, witl1 the exceptionihat, thissleeveis not prov1decl Wih sorew threacls.

lt has a conloal exterior surface 114 aclapted 1 tocooperace wit-h theflaring surface 111. It is also provided with splines115, 115 the veryencls ofwhioh,11, 116, arecast W1tll1Il the :slots 103, 103,one spli nefor eaoh sloc.

Eaoh of thesplines ofuhe sleeve 113 :is (3011- nectecl b two brealzablecon-nections 117 117,

" with the'shield 100.

111 use this cloulole type machine expansion is placed in he hole 10 inthe Wall 11. A macnine bol is then passecl through the hole 16 in Ehework 17 ancl -screwed intothe '1igicl nui. 105, passing freely throughthe unvthreadecl sleeve 113, Fig. 12. By t henscrewing up 011 theloolt15 thebreakableconnections between the splines on lahe cone nut 104 auchthe unthreaclecl sleeve 113, Will be broken.

There Will bei no misalignment, however,

becauee the splines -0h the cone nut and the-splines1l5 on the sleeve113have their encls cast within thei1 respec-tive cooperao-v.

ingslofis 102221I1d 103 respeetively. This in+ sures that .there Will be110 relatfie rotation between the cone nut 104 andthe shield 100,-

orbetween the shielcl ancl theunthreaded sleeve- 113.

The splineson both the= cone nut fandl.thefl sleeve 113 beingpreieraolywedge shapecl,

be. Walls of the slots 102 and 103, Will =oe -forcecl apart, therebymateriallyhdcling to the main grip 01 boncl.formecl loy the cone nut 105cooperatmgt.W1th:theflamngur= face o1 the shield 100, und the..conesleeve 113 cooperating with the flaring sur. face 111 of theehield, Fig.8.

The opening in the mold forming the scop 101, serves to assisfthe quickflow of the T0 save the expense of drilli1ig a hole of 1 full depth such215 shown 111 F1gures 7 sind 8, wo may-drill a hole oflss depththan thelength of the holt anchor, so that when the holt anchor is loc'atecl, aportion of it Will -.protrucle from the hole, Fig. 1 1. VVhen thisprotruclingportion is :subject=;

ecl t-o force, as to lo1ows o1 21 hamnaet, 126, the breakableconnections willbe brokeh anc1 the eone nut forcecl into the shielcl asshown in 3 Fig.. 15. 111 this osition the holt Eanchor Will bepre-setancl pre-expancled without the 'aid of the holt 15. Such a holt may loelat'er usecl t0 support the'vvork, not shown in these figures, ancl,ifneoessary, the bonclor g'grip 01 the holt anchor may be' increased loy:ro-

tating a holt 15,not shown in Fig.- 15, clr2LW-5 ing the cone nut stillfurther into theshield. Of eourse the clouble type machine expansionshowriin Figures 9 t'o 13, inclusive, can be expanded by a hammer, 01' asimilar tool, in the same manner.

Our holt 'anchors a.re for use 1I1"WilllS,

fioorsyceilixigs, or supports of masonry,con=- crete, brick, terracotta, stone, or other ma terial 1IlWlllCll 1t 1s 1mposs1lole d1reotlyscrew a screw, or dr1ve a nzul or sp1ke.

l/Vhile we have illustrated and clescribed a machine holt cooperatingwith the oone nut,

it is 01 course, to be understoool that our 1I1-' vention anal ourclaims cover a holt having lag screw threacls{ or a njr;other. fo1"m ofthreacls, an l tha't the :cone nut W1ll be pro vicled with cooperatingfemale threads.

ing a bolt anchor having an integral shielcl provicletl W1th cooperatmgmterlock1ng snrfaces, an integral expancling 1nernbel pro viclecl Withinterlocking surfaces, ancl integral breakable 1neans holding saidinterlocking snrfaces 011 the shielcl and expancling member in line Witheaelr other anc1 also holcling the integral shielcl ancl integralexpancling member rigidlytogether in their.

initial position and aclaptecl to perrnit the interloeking surfaces 011the integral shielcl and integral expanding 1nember t0 positivelycooperate with each other t0 prevent 1n1salign1nentof said xne1nbers.

2. Ina bolt anchor the con1bination 0f an expans1ble shielcl prov1cleclvv1th t1nes and slots, an integral expand1ng menaber 11g1dly l1-elcl t0-the shielcl by splines closing the slots, ancl breakabl-e connectionsbetween the splines 21I1Cl the shielcl.

3. In a bolt ancl1or the cornbiriation of an expansible sl1ielclproviclecl with tines ancl sl0ts, an integral expancling 1ne1nberrigiclly helcl to the shielcl by splines extencling int0 theslots,*1nore er less, ancl breakable conne@ tions between the splinesancl the shielcl.

4. In a bolt anchor the Cornbination of an expansible shield provicleclwith tines and slots, an integral expancling member rigiclly held t0 theshield by wedges closing the slots, ancl breakable cnnections betweenthe weclges ancl the shield.

5. In a blt ancho-r the cornbination of an expansible 'shield provicleclwith. tines and slots, an integral expancling 1ne1nber rigidly helrl t0the snielcl by wedges extending int0 the slots,1nore or lese, andbreakable connections between the weclges ancl the shielcl.

6. Tl1e combination in adouble type maclnn-e expanslon of an 1ntegralslnelcl hav1ng cooperatmg 1nterlo0k1ng surfaces for a cone nut ancl acone sleeve, an integral exparicling cene nut promcled W1th 1nterloclnngsurfaces to cooperatewith those carriecl by the shielcl, integralbreakable connections l1olcling the saicl co-operating interlockingsuriaces 0n the conenut in line with the c0-operating interloclringsurfac es on the shield antl also holding the cone nut and shieldrigiclly together ncl adaptecl t0 pern1it the interlocking snr-' faces0n the shielcl anal cone nut to positively cooperate witl1 ea.ch othert0 prevent mis alignxnent, a cone sleeve providecl. with interl0ckingsurfaces to c00peratewith those carriecl by the shielclancl integralbreakable connections holclingthe saicl co-operating interlockingsurfaces 011 the cone sleeve in line Wltll the. co-operat1ng1nterlock1ng surftces tegral casting.

sleeve closing saicl slots in the shielcl, ancl breakable connectionsbetween said splines and said shield.

8. The comloination in a double type ma chine expansion 0f an integralshield having cooperating slots at each encl O f the shield, an integralcone mit at one encl of the shield and an integral cone sleeve at theother end of the shielcl, splines on the cone nut anal cone sleeveextending into saicl slots in the shielcl, ancl breakable connectionsbetween said splines and saicl shield.

9. The combination in a cloubletype nachine expansion 0f an integralshield having cooperating slots at each enol of. the shielol, anintegral cone nut at one end of the shield ancl an integral cone sleeveat the other encl 0f the shielcl, wedges on the cone nut and cone sleeveclosing said slots in the shielcl, and breakable connections betweensaid weclges ancl said shield.

10. A new article 0f manufacture Coniprising a cast bolt anchor havingan integral shielcl pr0vided with one or more slots and tines, anintegralexpancling 1ne1nber provid ed With one 0r more integral splines,ai1d breakable runners connecting the splines with the integral shield,theentire bolt anchor being a single integral casting.

11. A new article 0it' manu'facture comprising a cast bolt anchor havingan integral shield pr0violed with one ormore slots and tines, anintegral expancling mennber providecl with one or moreint'egralsplinesthe end of one spline being rigiclly held within a slotin the sliielcl, ancl bre akable runners connecting the spline witlieach side 0f the slot, the entire bolt anchor being a single in- 12. Anew article 0f manufa(zture cornpris ing a cast bolt anchdr having anintegral shield providecl with one or more slots ai1d tines, an integralexpanding member pro- Vided withone 0r more integral wedges, and

breakable runners, connecting the. wedges with the integral shield, theentire bolt anchor being a Single integral casti1ig. V

HENRY W. PLEISTER. JOHN KARITZKY.

